DevTools: remove UISourceCodeFrame from context when switching panels.

third_party/WebKit/Source/devtools/front_end/ui/Context.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @constructor
  */
 WebInspector.Context = function()
 {
     this._flavors = new Map();
@@ skipping 24 matching lines @@
         this._dispatchFlavorChange(flavorType, flavorValue);
     },
 
     /**
      * @param {function(new:T, ...)} flavorType
      * @param {?T} flavorValue
      * @template T
      */
     _dispatchFlavorChange: function(flavorType, flavorValue)
     {
-        self.runtime.extensions(WebInspector.ContextFlavorListener, flavorValue).map(extension => {
-            extension.instance().then(instance => /** @type {!WebInspector.ContextFlavorListener} */ (instance).flavorChanged(flavorValue));
-        });
-
+        for (var extension of self.runtime.extensions(WebInspector.ContextFlavorListener)) {
+            if (extension.hasContextType(flavorType))
+                extension.instance().then(instance => /** @type {!WebInspector.ContextFlavorListener} */ (instance).flavorChanged(flavorValue));
+        }
         var dispatcher = this._eventDispatchers.get(flavorType);
         if (!dispatcher)
             return;
         dispatcher.dispatchEventToListeners(WebInspector.Context.Events.FlavorChanged, flavorValue);
     },
 
     /**
      * @param {function(new:Object, ...)} flavorType
      * @param {function(!WebInspector.Event)} listener
      * @param {!Object=} thisObject
@@ skipping 65 matching lines @@
 WebInspector.ContextFlavorListener = function() { }
 
 WebInspector.ContextFlavorListener.prototype = {
     /**
      * @param {?Object} object
      */
     flavorChanged: function(object) { }
 }
 
 WebInspector.context = new WebInspector.Context();